Heat exchanger



C. A. CROWL HEAT EXCHANGER Filed June 10, .1932

April 18, 1933.

Patented pr. 18, 1933 .UNITED cHaRLEs A. ciaown, OF'NEW CASTLE,` PENNSYLVANIA, AssIGNomBY-MESNE ASSIGN- f MENTS, To- STEWART iP. Eo1'..Tz, oENnw CASTLE, 'TENNSYLVANIA As vTItUsT'nE HEAT EXCHANGER 4.applicaum aleauii 1o,

i and more particularly to'multipleunit heat exchangers having paralle'ljluid conducting passages. u i' It is among the objects of this invention to provide a heatexchanger whichfhas two parallel fluid conducting passages, comprises a plurality of 'interchangeable' doubledlwalled fluid-conducting, elements jco'nnected end` to end, is quickly and easily assembled in any desired length, andA economically'and eili-V ciently` produces heat exchange between two fluids lilowing therethro ugh.

In accordance with the inventionthere is provided a heat exchanger comprising a plurality of double-walled fluid-conducting elements having extended integral rims and connected end'to end between two coupling members. 'Each of these elements is provided with a conduit through it and with a plurality of apertures in its walls forming with the other elements two parallel intertwined zig-` zag liuid passages, one passage being disposed inthe elements and the other between them.

The invention is illustrated in the accompanying drawing, of which Fig. 1 is an end view of a fluid conducting element; Fig. 2 a side elevation of an assembled heat ex- 1 changer shown partly in section, the sectional lar to Fig. 2, with the sectional portion taken on the plane indicated by line III-IH of Fig. 1.

Referring to the drawing, a plurality of interchangeable fluid conducting elements 1 are disposed end to end with gaskets 2 between them, each end of the structure thus formed being provided with a coupling or end member 3. Elements 1 are retained in position between couplings 8 by rods l which pass through the entire structure and are held in place by nuts 5 turned onV their threaded ends against the couplings, thereby for@ ing the elements tightly together and forin-A ing` a complet-e heat exchanger.v

Each element 1, preferably a one-piece cylindrical casting, has two' spaced walls'? and 8 encircled and connected at their peripheries 50 by an integral annular rim 9 formingwith 1932. salerno. l616,459. il

themas a chamba-'1o within fheeieemz i support 11 Yreinforces thewalls substan-f," tially their centers. Bosses12;13,14yand115,"

integral with the rimand `the-walls, extend through the element at four"points'equally` spaced apart, and Vform Alongitudinal aper-A tures 16 through whichv rods'lL extend.' y l semi-circular flange 18, projecting outward' from wall 7 extends fromj boss 12jto'bo`ss 14! by Way of bossl, and a like flange 19,!pr'o`l jecting from wall 8, extends' from`boss12'to boss 14 by way ofboss 15, the twotlang'es thus beingv diagonally opposite each other.v

Between each of these 4flanges and the adjacent portions of rim9 there are two aren'ate?v apertures 21. openinginto.- chamber.` 1'0, lthere-y by Vforming a passagef through the element,` which Ais alsoV provided withV a'co'nduit 22 extending through it next'to;bos s"1'and flange 19,v the conduit being separated from fchamb'crf l0xby` wall'23 which formsk itl, f-

When the `elernents'are pla-cediend toen'd to form the'heat exchanger, each successive:

element r.1' is rotated on-its longitudinal axis;

yuntil its apertures 21 in fonef wallregifster witlifthe apertures 21'fin' 4the'ad-jacent wall':

ofthe preceding element, thus forminga coni` ment intothe corresponding chamber of the other. ,Therefore when all ofthe"ele/1r'ielI't-si 80V are `in proper position veach-one has been?" turned axially from they position occu` .pied by the elements' adjoining it. The fre-- sult" isV that a continuous zigzag A,pa'ssztge is formed through chambers 1 0 and apertures' 21`from oneend'jof the unit' tothev other:

Furthermore, turning each successivel'elementv v180DV lbringsl conduits 22 diagonally' 'opg posite each other, instead of in line, andl thereby provides' another continuous zigzag passage intertwined with:thefirst-mentionedY passage,but` this one isdisposed inipafritf'be- 're permit nuite@ beitreucealmoerf f charge pipes. Each member 3 comprises walls to represent its best 26 and 2.7 having an integral annular rim 28 encircling their peripheries and forming with the walls a chamber 29. Like elements 1, each end member is provided with bosses 31 having apertures 32 through'which the ends of rods 4 extend. A semi-circular flange 33, projecting outward from wall 26, registers with flange 18 of the adjoining element 1, there being two arcuate apertures 34 between flange 33and the adjacent extended portion of rim 28-registering with apertures 21 of the, adjoining element. A conduit 35,

having athreaded flanged outer end extends through the coupling member to chamber 25, and a flanged threaded aperture 36 in rim 28 opens into chamber 29 diametricallyy opposite'to apertures 34. 'Io conduits 35 and apertures 36 at the ends,V of the hea't exchanger inlet and outlet pipes may be connected for supplying the fluids to and carrying them away from the two parallel passages. v

j Fromfthe foregoing it will be apparent that a fluid, gaseous or liquid, flowing through one passage of the heat exchanger absorbs heat from another higher temperature fluid flowing through the other passage parallel to it, the transfer or exchange of heat being through the walls 7 and 8 of elements 1. The

flow of the fluids in the passages may be in the same direction or in opposite'directions, depending on which end of each passage is used for the connection of the inlet pipe.

" However,'in all cases the two fluidsv flow substantially parallel to each other on the opposite sides of walls'7 and 8, which is of material advantage in certain heat exchangingV operations, as for example in the cooling of spent pickling acids. `The extent of heat exchange or transfer area afforded by. each assembled apparatus depends upon the number of elements 1 which are used, each of which is alike, as are the coupling members 3. Accordingly, heat exchangers of any size may bey assembled from castings of but two different forms. t v

t According to the provisions of the patent statutes, I have explained the principle and mode of operation of my invention, and have illustrated and described what I now consider embodiment. I-Iowever, I desire to have itunderstood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim V1. A heat exchanger'comprising a plurality of interchangeable double-Walled fluid conducting elements having integral rims projecting outwardly from the walls connected end to end, each of said elements being provided with a conduit through it and a plurality of apertures in its walls and forming posed diagonally opposite each other, and

each elementy having a conduit therethrough adjacent said rim, Ysaid elements being connected end to end with said flanged aperturesy thereof registering, a continuous zigzag fluid passage through the elements and a parallel intertwining zigzag passage between them thereby being formed in the heat exchanger, and means for delivering fluids to and dis-` charging them from the respective passages. f l

In testimony whereof,I` sign my name.

` l CHARLES A. GROWL. 

